Die-casting machine



L. H. MORIN DIE CASTING MACHINE Filed Jan. 26, 1945 INVENTOR. lows HIV/01m H N m T T A Patented Aug. 17, 1948 Application March 25,

which is a "division 460,!)67, "September application January 2 Claims.

7 I :1 This invention relates to theforma-tion of what "are'kn'own as stringer lengthsin the production of separable fasteners of the type employing stringers. coupled and uncoupledby a slider movable-along the stringers. More particularly, the invention deal-s with a, machine for casting a successive series of scoops with means for decreasing: the number of scoops cast in one series in"producingpredetermined stringer lengths or stringers having a predetermined number 1 of scoops'thereon. Further, the invention includes means fori'spacing stringer lengths on the mountingustrand or tape in a continuous automatically operating machine, whereby a predetermined number of stringer lengthsrmay be produced on a single strand or tape;

vparts. are designated: by suitable reference characters in each: of the; views, and: in which;

Fig.1, diagrammatically illustrates a machine made according to my invention with: parts of the construction broken away and section; and

Fig; 2 'i's1a1diagrammatically detailed view of apart of theconstruction illustrated in" Fig. 1 1, and looking in the direction of the arrows 2-2 ofFig. 1.

This-application constitutes a ldivision of application 528,121, filed March 25,1944, which application in turn is a division of application "460,067; filedaseptember 29., L942.

In the :formation of separable fastener stringers of the type and kind under consideration, particularly in :die casting aseries or multiple 'of scoops on a mounting membersit hasbeen difiicult to produce stringers of the required length. For example, let us assume that. four scoops are cast in each operation of the. ma-

chine. In such case, if 16 scoops were desired on the resulting stringer, 4 casting operations would suffice .to produce this stringer. If, however; a stringenlet us say, of 17' scoops was required, it would be necessary to cast stringers of 20 scoop lengths, and then remove 3 of the scoops.-

"The above objectionable features not only necessitates undue waste of time and labor, but

also a waste in material and-further results in the production of makeshift partially marred stringers-involving the :difiiculty of removingithe past material irom the interstices of the braid of I the;mounting member.

application Serial 'No;

29, 1942; Divided and'this 26, 1 94's, Serial No. 574,698

January 7 1941. :Thedrawi-ng runners A3, 14, J5 and i6, leading'"i;0the

"I'heabove' obiecti n s: ove com lay hemachine or apparatus herein disclosed whichm;-

p oys means w ere y he a ser i t m-HES in pro n a prede m ned r ng ens-ti 1', 2 or 3 of the ivscoops. I

In considerin the diagrammatio il us ratie of the machine; or apparatus of thiseapplication, itis well to bear in mind that anautematifi lie ca tin machine, u h i riexample a metalss d in Patent antino r Ju e 13', 9M ma "be utilized. The spacing- .between the series pi scoops-for each stringer along thee and, tape brother-amounting so; thateaqh mountineaman-be subdivided to produce separate stringera may be obtained Icy-utilizing, in whole or'inpar, mechanism such :as is; shown in my prior Eel/tents 2';224,980.of December 171., 1194 and. 2;2 2.,: 5 .q diaar mma calk illustrates a term oi zrnechanism which: :may' be used incarrying' .out invention h u h i i obviousthat qotherrforms may :be used and at if -.desired, some :Of, the steps of any :method: tcsm d 'bexearriediout-byhand;

In F .1, 5 represents-came chats-least rliheirafie "view of one part of La .die having acseries atims- :pressions or cavitiesxifir;Flr, 8-. and :9 -;therein t o-= orrn a zcorresponding number ;of sco ps qfzazsapar hl rfastener stringer. These scoops are formed-at aspaced intervals along :the wbeaded :edge in; of ;a

tape Ill. or other mounting member also sup- ;portedqbetween the dies of the machine.

Also :formed :on the parting .zline of the ;die s is a large gate it :having individual "branc pendent impressions or cavities 6 tietively.

Alsoarranged on the parting ,line of ithe -di e, and paralleling the :bead .loof the-tape, iS.-.a con nn 121;, ion'which 'the sco ps rare pasta-and :by which--theiscoops;are fediromthe casting posiationqshownjat .the vtop of Fig. 1 ;to' the lowered positionindicated at I8,in;the formation of suczcessivei'series of zc'astings. ;Also,:onmthe par-ting linesof the die and extending into the gated; is arselectingcore l9, which: acts as a-valve :to

wcont-rol the various runners" t3; 1L4, Hand l5; leadsiing to: the impressions qr qcavities At 20 isindicatedzthe discharge-end of then'ozzle of- .a casting machine-through which oasting n'i'ater-ialais apressure injectewinto athe -dieswtocfill the cavities orimpressions ilistoxazor-; such ;portidn i 3 of these cavities as may not be shut off by the selecting core I9. Obviously, any suitable metallic or plastic material may be used.

The core pin I1 is mounted in a slide 2| which is actuated through a lever 22, in feeding the cast series to the position la, in which position they are held by an impression in the dies 5'conforming to thecomplete casting as indicated in the drawing. The core pin I1 is stripped from the scoops 23 by the partial closing of the dies 5 to engage the scoops.

Obviously, the selecting core l9 could be moved manually to close off as many of the runners l4, l5 and I6 as may be desired in any particular casting operation, but preferably this .core will be moved automatically. For this purpose, I have shown the selecting core l9 as mounted on a slide 24 having at its upper end a piston 25 which operates in an air cylinder 26. Air is admitted into the cylinder 26 below the piston through a port 21, and this air supply is controlled by a valve 28. In the valve 28 is a valve stem or plunger 29 carrying at its outer end a roller 30 which operates upon the links of a control chain 3|. The valve 28 has an inlet port 32 communicating with a source of compressed air supply. In the stem 29 is a passage 33 to place the port 32 in communication with a discharge port 34 which communicates with the port 21 through a pipe or tube indicated by the line 35. The above communication is established when the roller 30 operates upon the normal links of the chain 3|. However, the stem 29 is raised by a tripping lug 36 to close the port 32 and to bring the passage 33 in communication with an exhaust port 31 to exhaust the air from the cylinder 26. A spring 38 supports the roller 30 in constant engagement with the chain 3 l When the air is released from the cylinder 26, the piston 25 is depressed by a spring 39 to move the piston into engagement with an adjustable stop screw 40 or similar control. In the present diagrammatic illustration, the screw 40 is adjusted to a position to check downward movement of the piston 25 to the extent to close all of the branches or runners 14, I5 and I 6 by the core l9, leaving the runner I3 open, so that, in the next casting operation, a single scoop M will be formed in the cavity 6. This means that a single scoop is added to any multiple of the series of 4 castings made in producing a given stringer length. For example, if 17 scoops are required, ther will be 4 castings of the 4 series of scoops and the added single cast scoop 4|. If 18 scoops are required, then the screw 40 would be adjusted to expose the runners I3 and I4 to form scoops in the cavities 6 and I and, if l9 are required, the added runner l5 would be exposed to form a casting in the cavity 8.

At this time it is well to point out that in forming stringer lengths, a predetermined number of stringers of one length are made to fill a predetermined order, and after the machine is once set by the adjustment of the screw 40, the machine will continue to automatically produce all of the required stringers of the one predetermined or desired length. In proceeding to produce a quantity of another stringer length, suitable adjustments will be made, as will be apparent.

The control chain 3| is made of such length as to control and regulate the particular stringer to be produced and this chain will have one of the trips thereon to timely actuate the valve in exhausting the air from the cylinder to allow the core Hi to drop into its control position. Intermediate this tripping period, the valve is sup- 4 ported in position to maintain air in the cylinder, thus supporting the core H) in raised position.

Also provided on the chain 3| are one or more other trip lugs 42, with which a lever or other control 43 operates in controlling the wide spacing of the tape or other mounting II, to space one stringer length from another in accordance with the teachings in the patents hereinbefore cited. In this connection, and bearing in mind that two controls are employed on the chain 3|, the trip 36 will be arranged at one side of the chain, whereas the trips 42 will be arranged at the other side thereof, as diagrammatically illustrated in Fig. 2 of the drawing.

It will, of course, be apparent that the present diagrammatic illustration is simply to indicate one adaptation of the invention, as the scoops may be cast in any desired multiple, that is to say, two or more. While one type or form of scoop is shown, this again is Simply to illustrate one adaptation of the invention.

Considering my present invention generally, it may be said to comprise a machine or apparatus, wherein a plurality or series of castings are formed normally in each casting operation of the machine and these series of castings are repeated in a controlled series of casting operations and then, in one casting operation, only a part of the series of castings is formed, particularly when all of the castings in one cycle will not make up the required number of castings in what might be termed a group of castings. The final casting operation of the machine reduces the number of castings formed to make up the exact number of castings required in a group.

From this standpoint, it will be apparent that in the art of producing die castings, it will be possible to controlgroup formation of castings for any desired purpose, that is to say, for boxing, sorting and the like. Here again it. is also'to be borne in mind that it is not essential that the castings be formed on a mounting member and, in other instances, the mounting member, if employed, may simply constitute a means for supporting or retaining each group of castings in a coupled or united relationship.

Having fully described my invention, what I claim as new and desire to secure by Letters Patent is: Y

1. In a die casting machine having a pair of (lies with a plurality of cavities therein, an automatic control mechanism for controlling formation of castings in the cavities of said dies, a member supported between the dies and movable relatively thereto to control exposure of the cavities to material injected into the dies, a cylinder, a plunger in said cylinder and extending through one end thereof, the extended end of the plunger supporting said member, a long adjustment screw on the cylinder and cooperating with said plunger, adjustment of said screw controlling movement of said plunger and member to control exposure of the cavities for reception of casting material injected into the dies, spring means normally supporting said plunger in engagement with said screw, and means admitting air, under pressure, to the cylinder to move the plunger, with the member thereon, against the action of said spring means to expose all of the cavities of the dies for reception of casting material.

2. In a die casting machine having a pair 0 dies with a plurality of cavities therein, an automatic control mechanism for controlling formation of castings in the cavities of said dies, 9.

member supported between the dies and movable relatively thereto to control exposure of the cavities to material injected into the dies, a cylinder, a plunger in said cylinder and extending through one end thereof, the extended end of the plunger supporting said member, a long adjustment screw on the cylinder and cooperating with said plunger, adjustment of said screw controlling movement of said plunger and member to control exposure of the cavities for reception of casting material injected into the dies, spring means normally supporting said plunger in engagement with said screw, said last named means including a plunger valve, and means automatically tripping said valve to exhaust air from the cylinder in the operation of said plunger by said spring means.

LOUIS H. MORIN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date Pagenhart July 18, 1905 Engler Apr. 21, 1908 Street Feb. 10, 1925 Crocker July 5, 1932 Richter Feb. 12, 1935 Brown Oct. 14, 1941 Nest Nov. 2, 1943 Piron Dec. 14, 1943 Perry Apr. 18, 1944 Hurst Dec. 26, 1944 Ernst Apr. 24, 1945 Vickers Sept. '17, 1946 

